>So where was this quake for us less informed types?
>
>--Chuck
A 7.0 about 30 miles N of Joshua Tree (that is, about 90 miles
ENE of downtown LA). See
http://www.scec.org/
for more details.
According to the folks I know east of LA, the quake felt *much* bigger than the
'92 Landers Earthquake which was a 7.3 (and I personally rode out,
along with the Northridge quake a few years later.) Lots of stuff
thrown off tables and shelves.
Supposedly one of the I-40 bridges in Barstow is pretty badly damaged,
but still standing.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
After several years of "emergency" storage, I am relocating a large pile of
mostly DEC stuff from a friend's basement. I am finding stuff that I have
been looking for and finding stuff I forgot I had. Today was diskpack and
circuit-board day (rack day comes later ;-)
The most striking thing I found was a lot of PDP-11 core memory. If anyone is
looking for some, I'm willing to trade it for PDP-8 core, something I can put
to better use. In addition to several PDP-11/20 4K stacks (H207), there are
a couple of H214 stacks and one hex-height 16k set, G235, H217C and G114. I
do have driver boards for the 4K stacks, but not all the backplanes (I rescued
as much as I could of the contents of an 11/20 from the dumpster at work
around 1988, but it just wasn't all in there). I might even still have the
CPU box, but it is likely that I don't have a power supply.
One of the other interesting items are a M7260/M7251 pair, one marked
"datapath", one marked "11/05 control". These are clearly the CPU for an
11/05, but will they go into an 11/04 or short (not BA-11) 11/34 chassis
for testing?
Finally, we come to an RK11D board set... M7254 through M7257. What else is
needed to make a working controller? A custom backplane? Paddle cards? I
think I've got an RKV11 box attached to an 11/03 (I haven't pulled it out of
the corner yet) If I'm missing too much of it, I can probably fix the RK11C
that I got with my first RK05 drives. I've never used it and neither did the
people I got it from (they wanted the drives for something else and already
had the controller). I would like to back up the several dozen RK packs I
moved today, too. I have several options for CPUs and OSes, but I need to
identify which RK controllers are going to work before I can see about spinning
off RK images.
We took some pictures with my friend's digital camera. I'll post a URL when
he gets them to me and I get them up on my page.
-ethan
=====
Infinet has been sold. The domain is going away in February.
Please send all replies to
erd(a)iname.com
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com
Up Heads:
---------- Forwarded message ----------
Date: Sat, 16 Oct 1999 12:52:15 -0600
From: Charles Stoyer <cstoyer(a)support.interpex.com>
To: Info-PDP11(a)transarc.com
Subject: FS: PDP 11/03, 23 73
I have 3 LSI-11's from the very late '70's, early '80's. Basic units have
processor and RX02 drive. Accessories include 1 9-track tape drive (1600/800
bpi), RL02 10Mb disk drive (can't get removable disk out), A/D and clock
boards. Some spares.
Processors include 11/73, 11/23 and maybe 11/03.
At last check I think everything was in working order. Also Tektronix 4006
and large Non-DEC wide printer/printing terminal (dot matrix).
I can ship UPS ground if items are within limits. Items are in Golden,
Colorado, USA (near Denver).
No reasonable offer refused. E-mail cstoyer(a)support.interpex.com if
interested.
Charles
--
Charles Stoyer
Golden CO
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body being "unsubscribe" or "subscribe", respectively (without the quotes).
>Now had I known that! I was acting upon the assumption that like most other
>drives the 60 Hz RL02s would not work without significant changeover on the
>German 50 Hz power. Thank you very much for that info, next time I will
>know better and secure the drives.
Gonna try to take a RL02 as carry-on luggage? :-).
The above comment was only half-joking - I once took a full 10.5" high
PDP-11/44 on an international flight. The power supply (the heavy part!)
was removed and carried on, so that the main chassis (now just the
steel frame and backplanes) weighed about 45 pounds and could fly without
any checked-luggage-over-weight-allowance charges.
I was lucky that day - they didn't weigh carry-ons (they often do in
Europe now, and I think the limit is 5 or 7.5 kgs!)
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
I rescued two RTE manuals from the trash.
RTE System Internals, Volumes I and II, February 1981.
They look manuals from an HP training course.
Manuals are FREE.
I figure $5 should cover mailing within the US-48.
Lemme know or back in the bin they go.
Lance.
Lance Costanzo http://www.webhighrise.com
System Administrator Website and Virtual Domain Hosting
lance(a)costanzo.net starting at $5/month, no setup fees
Now had I known that! I was acting upon the assumption that like most other
drives the 60 Hz RL02s would not work without significant changeover on the
German 50 Hz power. Thank you very much for that info, next time I will
know better and secure the drives.
John G. Zabolitzky
<<<
In fact, my "RL01/RL02 Disk Drive Maintenance Course" textbook says:
The circuits controlling the drive motor in line are
located on two modules. The drive logic module
decodes the speed of the rotating spindle and sends
the signals to the AC servo module which controls
the drive motor's duty cycle.
>>>
>Well I see that just about every computer-related section on eBay has an
>entry for "Computer mini-vacuum only $14.99". I guess that if you have the
>time to develop a script that reposts your item (read "advertisement") to
>dozens of sections every week, for supposed auction, then eBay doesn't
>mind. Personally I find this sort of ad irritating.
I find it very tacky, too! Besides, E-bay frowns on any links
which refer to anything they may possibly view as a competitor, and
I'm already teamed up with Amazon.com myself. (Besides, some folks
here already view my teaming with Amazon.com as if I had signed a pact
with the devil, but that's another story.)
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Before I attempt to figure this one out I would like to know if anyone else
can help me.
I hooked up an ASR-33 (non DEC) to my PDP-8/s. I ran a maindec program and
the PDP could talk to the teletype no problem, never an error.
After spending 4 1/2 hours cleaning up bad solder joints on the receiver I
got it up and running.... *kind of*
The problem is this: The ASR-33 is interfaced to the PDP currently by tying
one receive line to the input of a R107 (transistor inverter) and the other
receiver line to the output of the same inverter. Then, the signal is
*conditioned* (inverted) a few times before it is passed onto shift
registers,,, etc..
If I hook up the teletype the WAY the circuit exists now I get a 0-1V data
signal (notice positive) out of the first inverter which of course is
totally incompatible with the others and the signal never passes through
beyond the first inverter.
If I disconnect the FIRST inverter from the second one and LEAVE the one
receive line in the input of the first inverter ("floating") and hook up the
SECOND receive line to the input of the now *disconnected* second inverter I
get data. Most of the time good, but some bad characters get through.
This is obviously not a working current loop solution.
If the teletype is passive should I just connect the receive line on the
input of the first inverter to ground or -3V???
Picture below:
----------------------------------------------------------------------------
-------------------------
The way it was:
Receive #1 -----------|>o----------(Receive #2)----------|>o---------|>o---
etc..
The SIGNAL at receive #2 was 0 -> +1 Volt (data)
The way it is now:
Receive #1-------|>o--- [broken] Receive
#2 -------|>o-------|>o------|>o----------
Clean looking data but flaky (prob due to the other *floating line*.
#1) As I don't have docs nearby on the ASR-33 and have never had a VERY
simple interface like this CAN I short the one receive line to ground or -3
volts????
I just want to make sure the ASR 33 does not have any active part that will
eat my PT08 for breakfast.
john
You made some good suggestions, and what I write below may look
as if I'm criticizing your techniques. I'm not critcizing your
techniques - they're about as good as they come! - but I am criticizing
how various phenomena on the web put people off of finding appropriate
resources.
>Here's how I find anything for classic computers:
>------------------------------------------------
>Look on 5 or 6 different search engines.
Unfortunately, many of the best classic archives have "dropped
off" the responses of most search engines. For instance, at one
point in time all of the DECUS indices I maintain at
http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/decus/
were tracked by Altavista and other major search engines. In the
past six months, though, they've all dropped off. Why? I think
it has to do with the trend for search engine designers to think that
"if it's old, it's not relevant", and in the web-world 6-months
old is *old*. Anyone seen the HotBot ads? If your web page is a
few months old, they rank you with the geezers!
With the increasing trend toward more glitzy web sites, I'm afraid that
an archive 20 or 30-year old text, source code, and assembler source
is going to get even fewer hits by many modern search engines.
>Search Dejanews.
This, actually, is pretty good, if you find the right responses. Many
Usenet responses, though, are of the form "see the FAQ" or "see the
<name but not URL goes here> archive", and a newbie won't know how to
find what the respondent is talking about.
(This applies to this mailing list here, too, BTW. There's a common
reliance on internal resources instead of pointing folks toward
resources maintained by folks off-list.)
>Post questions to this list and/or appropriate mailing lists/newsgroups.
Sure, this works quite well if you're already "in the know" enough to
know where to ask. I'm mainly concerned about folks who don't know where
to start.
>Look on eBay/Haggle/etc for possible books.
What I would really, really like to see is for places like eBay or
Amazon or Haggle maintain references to items they don't offer for sale.
Of course, there's zero commercial incentive for them to do so.
>Besides the web, mailing lists and newsgroups, events like the VCF are
>great.
Again, a wonderful resource for those already in the know! Though
if we're lucky some of the media coverage of the VCF events will actually
contain useful links to this mailing list and other resources.
>And perhaps people on this list who frequent swapmeets which are
>frequented by other classic computer enthusiasts would be willing to have
>a little stack of flyers sitting on a corner of their table.
This is a *very* excellent suggestion! Maybe I can help make it happen.
I can put together a glitzy postscript file (hey, I'm getting pretty
good at page layout in writing postscript by hand these days) with
good PDP-11/DEC resources listed on it.
Again, I'm putting my emphasis not necessarily on collectors, but on people who
continue to use classic computers. I, myself, am not particularly impressed
by websites that are just pictures of someone's computer collection and
talk about these machines as relics from the past or museum items. But
I *am* impressed by folks who continue to actively develop for older
platforms, and want to let the wider world know what's available today.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Pardon the noise, but I need to contact . . . .
Clint-- I need you to contact me via private
e-mail. The last address I got bounces.
Thanks!
Jeff
We now return you to our normally scheduled programme . ..
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